Use the ideal gas equation:
PV = nRT
Hence, 'nR' is a constant term
=> (PV/T) = constant
=> (PV/T)1 = (PV/T)2
Put in the given values on the left hand side and the STP conditions on the right. Remember to take temperature in Kelvin!
A sample of oxygen has a volume of 205cm³ when its temperature is 22.0°C and its pressure is 30.8 kPa.
What volume will the gas occupy at STP?
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